Question 17: A randomly selected group of organisms from a family would show more genetic variation than a randomly selected group from a:

kingdom

order

phylum

genus

class

Question 18: The only taxon that actually exists as a natural unit is:

phylum

class

order

kingdom

species

Question 19: Which of the following is NOT generally a characteristic of complex, advanced organisms?

mesoderm

sessile

bilateral symmetry

true tissues and organs

a true coelem

Question 20: Which of the following levels of organisation is arranged in the correct sequence from most to least inclusive? (inclusive means that it contains more different types of organisms)

biome, ecosystem, community, population

ecosystem, population, community, individual

biosphere, biome, community, ecosystem

ecosystem, biome, biosphere, population

Question 21: Biological control of an invasive species of a plant would include:

fungicides

chemical pesticides

a fungal disease

fire

Question 22: An introduced or invasive species:

must out-compete native species to be successful

is successful if its population is greater than any other species

will benefit the ecosystem by increasing diversity

will cause a population collapse

Question 23: A population is correctly defined as having which of the following characteristics?
I. inhabiting the same general area
II. individuals belonging to the same species
III. possessing a constant and uniform density and dispersion

II. and III. only

I., II., and III.

III. only

I. only

I. and II. only

Question 24: The most important factor(s) affecting the distribution of biomes is/are:

community succession

day length and rainfall

climate

species diversity

wind and water current patterns

Question 25: Which of these is NOT an abiotic factor?

disease

breeding sites

soil minerals

light

soil pH

Question 26: Which of these is NOT a biotic factor?

predation

territory

waste pollution

population

competition

Question 27: Which of these are important biotic factors that can affect the structure and organisation of biological communities?